content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2013, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
   * Other names may be trademarks of their respective owners.]
   *
   * ----------------
   * ParamChecks.java
   * ----------------
   * (C) Copyright 2011, 2013, by Object Refinery Limited.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   -;
   *
   * Changes
   * -------
   * 16-Oct-2011 : Version 1 (DG);
   * 01-Jan-2013 : Added requireInRange() method (DG);
   *
   */
  
  package org.jfree.chart.util;
  
  /**
   * A utility class for checking parameters.
   *
   * @since 1.0.14
   */
  public class ParamChecks {
  
      /**
       * Throws an <code>IllegalArgumentException</code> if the supplied
       * <code>param</code> is <code>null</code>.
       *
       * @param param  the parameter to check (<code>null</code> permitted).
       * @param name  the name of the parameter (to use in the exception message
       *     if <code>param</code> is <code>null</code>).
       *
       * @throws IllegalArgumentException  if <code>param</code> is
       *     <code>null</code>.
       *
       * @since 1.0.14
       */
      public static void nullNotPermitted(Object param, String name) {
          if (param == null) {
              throw new IllegalArgumentException("Null '" + name + "' argument.");
          }
      }
  
      /**
       * Throws an <code>IllegalArgumentException</code> if the supplied
       * <code>value</code> is not in the range <code>lowerBound</code> to
       * <code>upperBound</code> inclusive.
       *
       * @param value  the value to check.
       * @param valueStr  the name of the parameter (to use in the exception
       *     message).
       * @param lowerBound  the lower bound.
       * @param upperBound  the upper bound.
       *
       * @throws IllegalArgumentException  if the supplied <code>value</code> is
       *     not in the range <code>lowerBound</code> to <code>upperBound</code>
       *     inclusive.
       *
       * @since 1.0.15
       */
      public static void requireInRange(double value, String valueStr,
              double lowerBound, double upperBound) {
          if (value < lowerBound || value > upperBound || Double.isNaN(value)) {
              throw new IllegalArgumentException("Requires '"
                      + valueStr + "' in the range " + lowerBound + " to "
                      + upperBound);
          }
      }
  
  }
  